我需要拍摄图像并将其放置在新的生成的白色背景上,以便将其转换为可下载的桌面墙纸。因此该过程将进行:
- 生成具有1440x900尺寸的新全白图像
- 将现有图像放在顶部居中
- 另存为单个图像
在PIL中,我看到了该ImageDraw
对象,但是没有任何迹象表明它可以将现有的图像数据绘制到另一个图像上。任何人都可以推荐的建议或链接?
Answers:
这可以通过Image实例的paste
方法来完成:
from PIL import Image
img = Image.open('/path/to/file', 'r')
img_w, img_h = img.size
background = Image.new('RGBA', (1440, 900), (255, 255, 255, 255))
bg_w, bg_h = background.size
offset = ((bg_w - img_w) // 2, (bg_h - img_h) // 2)
background.paste(img, offset)
background.save('out.png')
可以在Nadia Alramli的PIL教程中了解此PIL技巧和其他许多技巧
根据unutbus答案:
#!/usr/bin/env python
from PIL import Image
import math
def resize_canvas(old_image_path="314.jpg", new_image_path="save.jpg",
canvas_width=500, canvas_height=500):
"""
Place one image on another image.
Resize the canvas of old_image_path and store the new image in
new_image_path. Center the image on the new canvas.
"""
im = Image.open(old_image_path)
old_width, old_height = im.size
# Center the image
x1 = int(math.floor((canvas_width - old_width) / 2))
y1 = int(math.floor((canvas_height - old_height) / 2))
mode = im.mode
if len(mode) == 1: # L, 1
new_background = (255)
if len(mode) == 3: # RGB
new_background = (255, 255, 255)
if len(mode) == 4: # RGBA, CMYK
new_background = (255, 255, 255, 255)
newImage = Image.new(mode, (canvas_width, canvas_height), new_background)
newImage.paste(im, (x1, y1, x1 + old_width, y1 + old_height))
newImage.save(new_image_path)
resize_canvas()
请记住,请使用Pillow(文档,GitHub,PyPI)而不是python-imaging,因为Pillow可与Python 2.X和Python 3.X一起使用。
这是做类似的事情
我开始的地方是在photoshop中生成“白色背景”并将其导出为PNG文件。那就是我得到im1的地方(图1)。然后使用粘贴功能,因为这样更容易。
from PIL import Image
im1 = Image.open('image/path/1.png')
im2 = Image.open('image/path/2.png')
area = (40, 1345, 551, 1625)
im1.paste(im2, area)
l>(511+40) l>(280+1345)
| l> From 0 (move, 1345px down)
-> From 0 (top left, move 40 pixels right)
Okay so where did these #'s come from? (40, 1345, 551, 1625) im2.size (511, 280) Because I added 40 right and 1345 down (40, 1345, 511, 280) I must add them to the original image size which = (40, 1345, 551, 1625)
im1.show()
显示你的新形象